Implants

Please find the document 'Prostheses used in hip, knee, ankle, elbow and shoulder replacements 2020' on the Downloads page.

This accompanies the main NJR Annual Report and contains information on:

• Prostheses used in hip procedures

• Prostheses used in knee procedures

• Prostheses used in ankle procedures

• Prostheses used in elbow procedures

• Prostheses used in shoulder procedures

• Cement use and

• Bone substitute use

The NJR Implant Scrutiny Committee reports Level 1 outlier implants to the MHRA. There are currently 11 hip stems, nine hip acetabular (cup) components and 29 hip stem / cup combinations reported. A total of 14 knee brands are currently reported. Knee implants with and without patella resurfacing are now included in implant outlier analysis.

An implant is considered to be a Level 1 outlier when its Prosthesis Time Incident Rate (PTIR) is more than twice the PTIR of the group, allowing for confidence intervals. These are shown as the number of revisions per 100 prosthesis-years. As of March 2015, we have started to identify the best performing implants, these would have a PTIR less than half that of their group, allowing for confidence intervals. To date no implants have reached that level.

Components and constructs previously reported to MHRA, but no longer at Level 1, are not listed.

Hip implant performance

Best performing hip implants

There are no hip implants or combinations performing statistically less than half their expected PTIR.

Knee implant performance

Best performing knee implants

There are no knee implants performing statistically less than half their expected PTIR.